Bump version to 2.48.0-dev #3664

Job	Run time
Prepare CodeQL unit test matrix	4s
Run unit tests (cpp, 2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4, ubuntu-latest-xl, codeql-...	1h 40m 15s
Run unit tests (c, 2.19.4, codeql-cli/v2.19.4, codeql-bundle-v2.19.4, ubuntu-latest-xl, codeql-cl...	35m 43s
Validate test results	5s
	2h 16m 7s

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